Choosing between fountain pen inks often comes down to one practical question: which named color do you actually want to try? Lennon Tool Bar Sesame Oil and Diamine Marie Rose are closely matched as small bottled samples, so there is no broad feature advantage to simplify the decision. The useful shortcut is to start with the ink color, then use the listed price as a tie-breaker.
Quick verdict
Choose Lennon Tool Bar Sesame Oil if Sesame Oil is the color you want or the lower listed price matters most. Choose Diamine Marie Rose when Marie Rose is the target color. Both are described as new ink samples in mini plastic bottles, so the choice is led by color preference rather than a different format or material.
Compact comparison
| Sample | Listed price | Ink Color | Listed format |
|---|---|---|---|
| Lennon Tool Bar Sesame Oil | USD 3.99 | Sesame Oil | 3mL mini plastic bottle |
| Diamine Marie Rose | USD 4.25 | Marie Rose | 3mL mini plastic bottle |
Where each one wins
- Lennon Tool Bar Sesame Oil: wins on the listed price. The $0.26 spread is a clear tie-breaker when either named ink color could suit your writing setup.
- Diamine Marie Rose: wins when the desired Ink Color is specifically Marie Rose. Its reason to cost more is not a different bottle format; it is the distinct color choice.
Product notes
Lennon Tool Bar Sesame Oil

Lennon Tool Bar Sesame Oil fits a shopper who has already settled on the Sesame Oil ink color and wants a defined 3mL fountain pen ink sample. The mini plastic bottle keeps the purchase focused on trying that named shade in a small format. Its listed price is also the lower of the pair, which helps when the color decision is otherwise close. The limitation is visual certainty: the actual color may vary slightly because of lighting and screen differences, so a screen-based shade decision has some uncertainty. Choose this sample when "Sesame Oil" is the color phrase that matches your preference; the ink material and new condition do not add a separate reason to favor it over Marie Rose.
Diamine Marie Rose

Diamine Marie Rose fits a shopper whose priority is the specifically named Marie Rose ink color. Like its counterpart, it is a 3mL sample in a mini plastic bottle, giving it a compact way to try the color without changing the basic format of the comparison. The trade-off is that the actual color may vary slightly with lighting and screen differences, which can make a display-based color choice less exact. That limitation applies to the color decision itself, not to the bottle format. Select Marie Rose when that name is the intended color target; choose Sesame Oil when the other named color is the one you want to explore.
Final choice by use case
- Choose Lennon Tool Bar Sesame Oil for the lower-price route or when Sesame Oil is the desired Ink Color.
- Choose Diamine Marie Rose when Marie Rose is the desired Ink Color and that specific shade matters more than the small price difference.
- If you are undecided, let the named color decide first, since both samples share the same 3mL mini plastic bottle format and ink material.
There is no all-purpose winner here. Lennon Tool Bar Sesame Oil is the practical price-led choice, while Diamine Marie Rose is the color-led choice for shoppers seeking Marie Rose.